Improvement in machines for rolling sheet or plate metals



3. Q. E'VERSQN.

I MACHINES FOR ROLLING SHEET 0R PLATE METALS. No. 179,178. Patented June27, 1876.

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UNITED STATES PATEN Fro.

JOHN Q. EVERSON, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENTIN MACHINES FOR ROLLING SHEET OR PLATE METALS.

Specification forming part of Letters Patent No. 179,178, dated June 27,1876; application filed May 29, 1876..

My invention relates to that class of ma-.

chinery used in rolling sheet or plate metals; and consists of a guardattachment, made to the sheet or plate train, the guard being operatedin such a manner as to prevent the break- -ing of the spindles, housing,and finishingrolls.

In the usual method of rolling sheet or plate metals two sets of rollsare used. The first that are used are known as roughing or breakingdown, the other rolls are finishing or chilled.

The roughing-down rolls are used to reduce the mass of metal when itcomes from the heated furnace into a plate or slab of the requiredwidth, and also to diminish its thickness. After the metal is thusbroken down it is taken to the chilled or finishing rolls, and is thererolled and finished to the gage required in the finished plate or sheet.This operation is accomplished by means of vertical holding-down screws,which work in steel nuts let down into the housings, and press on thetop brasses of the top rolls, thus allowing the rolls to be tighteneddown to rough and finish to any gage desired.

For the purpose of greater facility and accuracy, the tightening-downscrews are geared so as to move together by means of suitable devices.

It will readily be seen after the sheet or plate is passed through thechilled or finishing rolls, on the last pass required to finish it,

that the chilled rolls will be tightened down considerably more thanthey were when the metal was first passed through them, and that it willbe necessary to unloosen the tighteningscrews before another sheet orplate can be passed through without breaking the rolls or housings, ordoing other serious injury to the train.

In the rolling of sheet or plate metals, and especially in sheet andplate iron, many chilled rolls are broken by putting the sheet or plate,as it comes from the roughing into the finishing-rolls when thetightening apparatus of the chills is screwed down. If the rolls do not,the housingor something else must break before the sheet or plate canpass through.

The object of my invention is to prevent the rougher-down from putting aplate or sheet into the finishing-rolls when they are tightened down,and have not been released after having made the last pass on thepreceding sheet or plate. This object I have fully at tained inpractical experiments by the use of a guard, attached to the housing,and actuated from the movement of the tightening-down apparatus of thechill or finishing rolls, by means of devices hereinafter described.

I will now proceed to describe my invention, reference being had to theaccompanying drawing, forming part of this specification, in whichFigure 1 shows a front elevation of a sheet or plate train, with theguard attachment, showing the tighteningdown apparatus of thefinishing-rolls released, and the guard-arm drawn back to thehousingofthe roughing-rolls. Fig. 2 is a vertical plan of same, showingthe tightening-down apparatus of the finishingrolls screwed down, andthe guardarm thrown forward, blockading the way between the roughing andfinishing rolls.

Like letters of reference indicate like parts in each.

The dotted line extending from the guardarm K to the housing of theroughing-rolls shows the the line of movement, and the position theguardarm K will take when the tightening-down apparatus is released. Thedotted line 00 00, extending from the roughing to the finishing rolls,shows the path taken by the rougher-down when taking the sheet or platefrom the roughing to the finishing rolls.

It will readily be seen, from the position of the guard-arm, as shown inFig. 2, that the rougher-down cannot take a sheet or slab from theroughing to the finishing rolls without being forcibly reminded of thefact that the tightening-down apparatus of the finishingrolls has notbeen released after making the last pass on the preceding sheet orplate.

The arrow T shows the direction the tightening-down mechanism is movedto release the" rolls, and to draw the guard-arm K back to the positionshown in Fig. 1, indicated by the arrow Q.

A A are the roughing-rolls; B B, the finishing or chilled rolls U C, thetightening-down screws of the finishing or chilled rolls; D D arehorizontal hand-levers, attached to, and for the purpose of tighteningdown and releasing, the screws 0 C. e isan adjustable link or rodconnecting the hand'levers D' D, so as to cause them to move in unison.F is a curved horizontal crank-arm, attached at one end to thetightening-down screw 0, and having a slot and adjustable bolt at theother end, for the purpose of regulating the throw or movement of theconnecting rod or link G.

G is an adjustable link or rod, connecting the horizontal curvedcrank-arm F to the horzontal crank-arm H. Said crank-arm H is attachedto the vertical shaft J. J is a vertical shaft, which works in, and issupportedby, the two brackets P 1?, set out from the housing of thefinishing-rolls. K is a horizontal guard-arm, attached to the verticalshaft J.

For the purpose ofkeeping the guard-arm out of the way when not usingit, I attach the spiral spring S, from shaft J, to the lower bracket 1?,on which said shaft works.

I do not wish to confine my invention to the use of the precedingdevices for giving the required motion to the guard-arm K, as it isobvious the guard arm K may be thrown into thepositions-desired by manyother deat its lower end, working into a sliding guardarm, furnishedwith teeth, and arranged so as tomove back between the housings of thefinishing and roughing rolls when the tightening-screws are released,and forward when they are put down.

Having thus described my invention, what I claim, anddesire to secure byLetters Patent, isy The combination of a guard-arm with thetightening-down mechanism of sheet or plate trains, andintermediatemechanism for actuating the guard-arm from thetightening-down mechanism, substantially as andfor the purpose setforth.

In testimony whereof I, the said JOHN Q. EVERSON, have hereunto set myhand.

JNO; Q. EVERSON. Witnesses JAMES I. KAY, FRANK M. REEsE.

